Sunday, July 19, 2020

Terminology

"Current proposal"as a subject heading is an oxymoron.

Current is as is, and proposal is what is different from the existing. If need to use, best to use current layout, and proposed layout

Carpark

The setup consist of 1 interconnected carpark, but 2 portions, namely sprinkled n unsprinkled.
The sprinkled came about as a result of having a commercial component placed adjacent to it, n for compartmentation for fscf, would have to be MV, hence sprinkled.

The sensitivity to F-F heights is crucial as there are connecting links from the landscape deck to the residential level, hence any further increase, would result in longer ramps, etc, explaning to PM why wasn't this captured, etc.

The hdb requirement for CP f-f is 2.8m, and for future ready is 3.3m. clear rqmt for driveway is 2.2m, so services like M&E, structure needs to clearly communicated . some issues along the way

-Column structure, basic 2 columns along each lot, vs 1 longer column, but beam depth would change for the uppermost level. current depth is 500mm, roof would have to be changed to 1000m
-it was a close shave for the sprinkler, as we will need localised sprinklers area to be with shallower beam

-Future ready rqmt clear height is 2.6m, so for the required lots area, this area should have a higher headroom

**-if area >2000sqm, smoke purging or smoke vents is needed to discharge smoke. Our problem came about for the depth of the fans. The logic to understand, smoke purging system needs a ductless jet fan and also duct mv. It seems the jet fan sucks in, and duct throws it out. These purging systems are deep, for eg 750mm, and would totally throw a 2.8m F-F provision off.
Terms are:


  • sprk MSCP MV fan - cater the fan within 3.5m between deck. UPC to confirm
  • sprk MSCP MV duct - cater duct depth such that 2.2m headroom is maintained. Check the routing against beam crossing. Ducts not allowed to penetrate.
  • sprk MSCP jet fan - relocate jetfan to residual area with <2m headroom and minimise omission of spare carpark lots. Jetfan can be positioned better without having columns blocking air flow (KTP's alt MSCP structural system). To consider the benefit in reference to omission of spare lots.
  • Alt MSCP structure design - 150mm from deck 3 can be given to KTP to mitigate their new beam depth at MSCP roof garden. min 2.3m headroom for HDB structure requirement. KTP to study the structure again to avoid raising another 150mm of roof garden level, in consideration of
    - commercial heights
    - staircase risers
    - various ramps linkbridges length to resi void decks
    - potential further overlooking issue, security/privacy issue
    - WVG further level mitigation to 120.00
  • UPC req on sanitary pipe = 600mm min from FFL and 300-400mm depth for S trap. To consider having the vertical stack before crossing any beam to avoid headroom issue.
  • sprk MSCP - sprinkler main pipe 100mm dia is allowed to penetrate beam at the highest deck soffit with min one-third span interval (KTP requirement). UPC and KTP to coordinate fully on this. Sprinkler pipes does not cross any beams for typ floors (KTP's alt structural system)

  • -Any change in height for mscp, wld affect the length of ramp internally to reach.to note turning radius and also lots that may need to be remove to cater for this additional length

    -thoughts on mscp:
    - if <2000sqm, smoke vent ok
    -if >5000sqm, smoke purging system. This then depends on whether it is sprkl or non-sprinkl.
    if sprinkl. This smps consist of MV fan(input), and MV duct(output), and also a jet fan
    . If natural vent, smps not needed.

    Wednesday, May 20, 2020

    Rainwater harvesting

    it is important to get clear the different between the rainwater harvesting tanks, detention tanks, storm-water tank and types of catchments.

    I think that is why in sexy architecture coffee table books, the ground plane is always emphasised.
    as this concerns also the larger mechanisms of rainwater systems if in place. Sensitivity to things is usually magnified a hundred fold, when the scale of the project is larger.

    Also the sequence of flow ( this affects placement of tanks) and invert levels(lowest point of tank) required for gravity feed. Otherwise, a pump is needed which we usually try to avoid, as it brings about maintenance and a need to conceal it. the understanding is that it is common for private projects, but for public housing, reducing the need for maintenance is key. As we know maintenance is tied to town councils, which is tied to the ward, which is connected to the all mighty.

    Note C&S scope of work, includes " hydrau;ic rqmts for rwht, n storage tank"

    The issue here is when there are 2 separate rainwater catchments.
    1) ABC bioswale ( direct discharge to external drains, so water can be " dirtier?"
    2) Rainwater harvesting ( for watering of plants)

    1)Catchments here are open deck of carparks, ponds, roof tops of commercial

    Catchement--->ABC Bioswale---> Direct Discharge

    2)Residential
     - the concern is that this catchment includes the resi corridor, and when washing, the soapy water/detergent also gets collected. This bets avoided. Although this being said, there is also a treatment room, attached to the harvesting tank?

    Catchment---> Harvesting tank--->Detention Tank---> "Recycled Water" for watering plants

    3)Stormwater tank ( required when there is a "basement")
    pub code of practice (4.10.(b), requires stormwater tank n RWHT to be separate

    Thursday, April 9, 2020

    Filters

    filters are mainly for the revit links.
    the sequence,

    1)VV- to set up filters, be it rule based on selection based?

    2) View Template, " custom" turn off visibility options for certain revit links

    Revit bootcamp, WFH day 4/30?

    The last blog entry was before covid 19, before the lockdown of 1 month
    the last revit skill learnt was before the pp set preparation

    how things unfold sometimes, there is really little sense in getting exasperated, yet we still do, i still do. About how things are left unsaid, unpinned, its like being placed in a room, with these puddles, formless, and having to find your way at intersections. or like being in a park, when there is all this green you can see, and pavilions for rest you can see, but yet, the path that takes you there is elusive. one is so temped to cut across the grass and get there, yet as a pack, one has the take the path, any path, paved or dirt, but that decision is to be made. The conversation is just, yes the answer is the pavilion. how to get there, when to get there, is all left uncharted. sometimes instead of saying, can i go to another pavilion, one says, how can i get to that one. anyhow, these formless ways of being, had me, my mind so twisted, that i slept till later today. woke up only at noon.

    deep breaths/
    i need to read more books about the way of the tao.
    googled on " how do you know when you are mentally stressed"
    solutions: feel what you are feeling, dont fixate on reasons, remind yourself this is not permanent.

    ok back to revit.
    Even blogger has a need to be precise and hashtags.
    actually the way revit is, i think we should get along just fine.

    some key concepts picked up.
    #VV: controls visibility of elements, and it is categorise ever so precisely.
    #view range: controls the depth of what one can see
    #groups: is the equivalent of a block in autocad
    #layering: importing of cad
    #plan region/ filled region
    #detail lines/ model lines
    #align vs extend element tool

    #view templates; filters
    this seems to be my achilles heel for now.
    it seems in terms of sequences: start with VV to set up a filter, and then with a view template, apply that filter.

    Sunday, March 29, 2020

    SCDF Elusive clause 2.2.6g "OR"

    Covid has spread its tentacles long and wide.
    Every page of the newspaper is filled with all aspects of it, from quarantine measures, to schools, to healthcare workers battling it.

    We r in the last days of march now.
    busy period, with an intensive crash course in revit

    and i found that clause, 2.2.6g
    where when one has multiple staircase (>2 sets), as long as either one, fulfills the travel distance.

    Thursday, March 5, 2020

    Time for reflection

    it has been about 4 months
    and all too easy to enjoy, to be complacent

    read the code. even if it is just for 30mins.

    design wise. simple knowing.
    and deciding which battles to fight

    1 month break

     was just trying to find how long before this pause. has it been 12 years? fukushima is 10 years. i prepared some lunch boxes. teared a bit....